4″ x 4″ pressure-treated posts
2″ x 4″ pressure-treated boards
2″ x 6″ pressure-treated boards
2″ x 10″ pressure-treated boards
galvanized deck screws
post hole digger
1. Select the site for the pergola and mark the placement of the four posts. Use a post-hole digger or two-person auger to dig holes to a depth of 24″ and width of 9″. Add a few inches of gravel to the bottom of the holes for drainage. Insert 4″ x 4″ posts in holes. Ensure the posts are level and plumb. Attach temporary 2″ x 4″ bracing to hold in place. Mix fast-drying cement according to the manufacturer’s directions and pour into holes. Let cure for 24 hours.
2. Cut joist beams from 2″ x 10″ boards to span the pergola posts. To create a decorative look on the end of the joist beams, draw a straight or curved design on the wood and cut along the line with a jigsaw. Temporarily clamp in place while holes are drilled through the beams and posts. Attach the beams to the posts using 3″ lag bolts.
3. Cut the stringers from 2″ x 6″ boards to span and overhang the joist beams. To create a decorative look on the end of the stringers, draw a straight or curved design on the wood and cut along the line with a jigsaw. Evenly space the stringers perpendicular to the beams and toenail in place using 3″ galvanized deck screws.